High Protein Egg Casserole

The smell of roasted bell peppers and browning turkey sausage on a Sunday morning is enough to make anyone stumble out of bed and into the kitchen. This high protein egg casserole came together on a rainy weekend when I needed something that would last through a busy work week without leaving me hungry by ten oclock. It is the kind of dish that turns simple fridge staples into something you actually look forward to eating every morning.

My roommate walked in while I was whisking the eggs and cottage cheese together and gave me the most skeptical look when she saw the curds floating in the bowl. By the time the casserole came out of the oven golden and puffed at the edges she had already claimed two slices for herself.

Ingredients

• 10 large eggs: The foundation of the whole casserole so use the freshest ones you can find for the best texture and color.
• 200 g lean turkey sausage: Crumbled and cooked beforehand so it browns properly and does not make the casserole greasy.
• 120 g low fat cottage cheese: This is the secret ingredient that makes the casserole incredibly creamy without needing heavy cream.
• 100 g shredded reduced fat cheddar cheese: Split between the mixture and the top so every bite has that melty cheesy pull.
• 1 red bell pepper: Diced small so it distributes evenly and adds a sweet crunch in every forkful.
• 1 small onion: Diced and mixed in raw because it cooks perfectly inside the casserole during baking.
• 80 g baby spinach: Roughly chopped so it blends in without creating long stringy pieces.
• 1 tsp garlic powder, 1/2 tsp smoked paprika, 1 tsp salt, 1/2 tsp black pepper: A simple seasoning blend that gives the whole dish a warm savory depth without overpowering anything.

Instructions

Get your oven and dish ready:

Preheat your oven to 180 degrees Celsius which is 350 degrees Fahrenheit and grease a 22 by 33 centimeter casserole dish with a little oil or cooking spray so nothing sticks.

Whisk the wet base:

Crack all ten eggs into a large bowl then add the cottage cheese, garlic powder, smoked paprika, salt, and pepper and whisk until everything is well combined and the cottage cheese is evenly distributed.

Fold in the good stuff:

Gently stir in the cooked turkey sausage, diced bell pepper, onion, chopped spinach, and half of the cheddar cheese so everything is spread throughout the egg mixture.

Pour and top:

Transfer the mixture into your prepared baking dish and spread it out evenly then sprinkle the remaining cheddar cheese over the top in an even layer.

Bake until golden and set:

Put it in the oven uncovered and bake for 30 to 35 minutes until the center is firm and the edges have turned a beautiful golden color.

Rest and serve:

Let the casserole cool for about five minutes before slicing into six portions so it holds its shape when you serve it warm.

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There is something deeply satisfying about pulling a bubbling golden casserole out of the oven on a quiet morning and knowing you have breakfast sorted for days.

Making It Your Own

This recipe is endlessly adaptable once you have the egg and cottage cheese base down. Try swapping the turkey sausage for lean chicken sausage or even a vegetarian option if that suits you better.

Storing and Reheating

Leftovers keep well in an airtight container in the fridge for up to five days. Reheat individual slices in the microwave for about 60 seconds or in a low oven until warmed through.

Serving Suggestions

A dollop of salsa on top adds a bright acidic kick that cuts through the richness of the eggs and cheese beautifully.

• Try serving with sliced avocado for extra creaminess and healthy fats.
• A handful of fresh cilantro on top makes everything taste brighter and more vibrant.
• Remember to let the casserole rest before cutting so your slices look clean and hold together on the plate.

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This casserole has become my reliable back pocket recipe for busy weeks and lazy Sunday mornings alike. I hope it earns a permanent spot in your rotation too.

Recipes Q&A

→ Can I make this egg casserole ahead of time?

Absolutely. Prepare the entire casserole, bake it, then store in the refrigerator for up to 5 days. Reheat individual portions in the microwave for 2-3 minutes or in the oven at 180°C until warmed through.

→ What vegetables work best in this high protein casserole?

Bell peppers, onions, and spinach are featured because they hold up well during baking. You can also add mushrooms, zucchini, broccoli, or diced tomatoes. Avoid watery vegetables like cucumber that release too much moisture.

→ Can I freeze this egg and sausage casserole?

Yes, freeze after baking and cooling completely. Cut into individual portions, wrap tightly in plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.

→ How do I know when the casserole is done baking?

The casserole is ready when the center is set and no longer jiggles, the edges are slightly golden, and a knife inserted in the center comes out clean. This typically takes 30-35 minutes at 180°C.

→ What can I substitute for turkey sausage?

Lean chicken sausage, vegetarian sausage crumbles, or cooked bacon work well. For a meatless version, increase the vegetables and add extra cheese or plant-based protein alternatives.